| Marine Biology Section Meeting | March 8th 2008 Petit Bot |
About 10 members met at Petit Bot on a blustery day at the equinoctial spring ( 0.83m) low tide. As the tide was turning we walked straight down to low tide mark and examined the rocks on either side of the beach. We found 6 species of sea anemones: Red and Green Beadlet, Strawberry, Snakelocks, Gem and Daisy. Beadlet Anemones are known by children in Guernsey as "Blood Suckers", this probably saves the anemones from too much disturbance by children playing on the beach. The Daisy Anemones looked like lumps of unappetising brown jelly with stones and shells stuck to them; quite unlike their beautiful mottled tentacles when they are covered with water.
Beadlet Anemones Actinia equina and prasina.
Strawberry Anemone Actinia fragaria.
Snakelocks Anemone Anemonia viridis.
Gem Anemone Aulactinia verrucosa.
Daisy Anemone Cereus pedunculatus.We found a beautiful green annelid worm, probably Eulalia viridis, crawling on the rocks.
Eulalia sp.In some places the weeds were plastered with the egg cases of the Netted Dog Whelk Hinia reticulata
Netted Dog Whelk egg capsules.
Netted Dog WhelkWe identified a few seaweeds,sponges and sea-squirts including:-
The red seaweed Lomentaria articulata
The brown seaweed Himanthalia elongata just starting to grow from its buttons
The red seaweed Rhodothamniella floridula binding sand at the edge of the rocks
The sponge Grantia compressa
The colonial sea-squirt Botryllus schlosseri
Barnacles Chthalamus sp. pitted by the marine lichen Pyrenocollema halodytesFulmars were nesting on the cliff at the east of the beach
FulmarsSome of the Section on the beach at Petit Bot
Marine Biology Section meeting